Image Settings Affecting Nuchal Translucency Measurement Using Volume NT(TM) Software
Yonsei Medical Journal
;
: 1345-1351, 2015.
Article
in English
| WPRIM
| ID: wpr-185885
ABSTRACT
PURPOSE:
To evaluate the effects of the deviation from the mid-sagittal plane, fetal image size, tissue harmonic imaging (THI), and speckle reduction filter (SRF) on the measurement of the nuchal translucency (NT) thickness using Volume NT(TM) software. MATERIALS ANDMETHODS:
In 79 pregnant women, NT was measured using Volume NT(TM). Firstly, the three-dimensional volumes were categorized based on the angle of deviation in 10degrees intervals from the mid-sagittal plane. Secondly, the operator downsized the fetal image to less than 50% of the screen (Method A) and by magnifying the image (Method B). Next, the image was magnified until the fetal head and thorax occupied 75% of the screen, and the NT was measured (Method C). Lastly, NT values were acquired with THI and SRF functions on, with each function alternately on, and with both functions off.RESULTS:
The mean differences in NT measurements were -0.09 mm (p<0.01) between two-dimensional (2D) and a deviation of 31-40degrees and -0.10 mm (p<0.01) between 2D and 41-50degrees. The intraclass correlation coefficients (ICC) for 2D-NT and NT according to image size were 0.858, 0.923, and 0.928 for methods A, B, and C, respectively. The ICC for 2D-NT and NT with respect to the THI and SRF were 0.786, 0.761, 0.740, and 0.731 with both functions on, THI only, SRF only, and with both functions off, respectively.CONCLUSION:
NT measurements made using Volume NT(TM) are affected by angle deviation from the mid-sagittal plane and fetal image size. Additionally, the highest correlation with 2D-NT was achieved when THI and SRF functions were used.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Software
/
Image Enhancement
/
Sensitivity and Specificity
/
Imaging, Three-Dimensional
/
Nuchal Translucency Measurement
/
Embryo, Mammalian
Type of study:
Diagnostic study
Limits:
Adult
/
Female
/
Humans
/
Pregnancy
Language:
English
Journal:
Yonsei Medical Journal
Year:
2015
Type:
Article
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